The interface checker uses a unique test transaction ID. If the receiving endpoint (e.g., middleware queue) deduplicates based on that ID but never purges the completed state, subsequent checker calls receive a “duplicate – processing” response indefinitely.
Background The PSA Interface Checker 440 Link (hereafter “Interface Checker 440”) is a diagnostic/verification device and related software used to validate signal integrity, protocol compliance, and physical connections for PSA (Passive Safety Assembly) interfaces in industrial and automotive control systems. This column evaluates its core capabilities, practical strengths and weaknesses, typical deployment scenarios, and hands-on tips to get reliable results in the field. psa interface checker 440 link
A download link for the Interface Checker tool itself that can communicate with the "440" revision hardware. The interface checker uses a unique test transaction ID